Thought I'd see what other info I can get from any passing tuners..

Hey guys,

Need some urgent help. Was transfering my gauges from my WRX to my new STi, and I've managed to destroy the threads on the block, above piston 3, where you tap the oil temperature gauge to. Can I get one of those kits which rethread the hole but a size up, and then use an adapter? Or is this completely not advisable on an engine..

Regards,

ScoobyDoo69

 

You could re-drill the hole bigger and use a helicoil to take it back to the origional size..

 

Any ideas what kind of shops on the street I could buy them from?

 

Not really a street thing, more specialist stuff..

Engineering Supplies - V-Coil / HeliCoil V-Coil Kits Metric

 

You have to ask yourself where all the swarf from Helicoiling it out will go - that is the oil feed drilling which supplys the head and mains/big ends.
You dont want to be doing that without stripping the engine to remove the swarf from the oil gallerys.

Just my 2 pence worth.

Mick

 

Well I would block the hole off, as that surely is the only way. Pulling the engine out and stripping it isn't going to be cheap at all, well over 1000quid from what I've been getting quotes of anyways. So I think I'm willing to take the risk and pay the extra whatever it is to rebuild the engine if necessary !

 

Russian roulette that mate!!.

A helicoil kit is not a cheap thing to buy and you will need to strip off the whole of the top of the engine to even begin to think about helicoiling it. The newly drilled hole needs to be accurate and straight. Then a new thread to suit the helicoil created and then the helicoil screwed into the fresh threaded hole.

There will be lots of swarf - alloy swarf sure, but none of it is good in the main oil gallery for the rear main bearings and the drivers side cylinder head.

I discussed it with the engineers here yesterday and we think that we can block off the hole successfully, without creating swarf and then relocate the sensor to another position on the engine.

David APi

Agents for Simtek, the most exciting new Ecu for years

 

I think I'm speaking without thinking David ! As you can probably understand I'm so annoyed with myself ! I'll give you a call later today again if that's ok?

 

 

Not specialist at all, easy to do.

I would use a real good hoover while drilling though.

 

i did the exact same thing as you mate, BUT the threads came out of the block, i used a longer adaptor that got the bottom thread and sorted it right out, unsire if thisis what you have done.

 

Sorry, Tom here took your call for me to call back and we don't have a number handy for you. Call again please.

David

 

"Specialist" as in you couldnt just go to B&Q and get a kit......But as Api said it would be a tricky thing to do, getting swarf in the oil way would be very bad news!

Hope you get it sorted tho mate!